Chicago / Chicago Transit Authority

A&R [Reissue A&R / Project Supervision] – David McLees A&R [Reissue A&R / Project Supervision] – Gary Peterson (2) A&R [Reissue A&R / Project Supervision] – Lee Loughnane Arranged By [Brass] – James Pankow Art Direction [Reissue Art Direction] – Maria Villar Coordinator [Reissue Liner Notes Coordination] – Tim Scanlin Cover – Nick Fasciano Design [Reissue Design] – Amy McFarland Design [Reissue Design] – Maria Villar Drums – Daniel Seraphine Engineer – Fred Catero Liner Notes – David Wild Management [Reissue Product Manager] – Mike Engstrom Other [Reissue Project Assistant] – April Milek Other [Reissue Project Assistant] – Bob O'Neill Other [Reissue Project Assistant] – Ingrid K. Olson Other [Reissue Project Assistant] – Randy Perry Other [Reissue Project Assistant] – Steve Woolard Photography By [Reissue Additional Photos] – Hugh Brown (3) Photography By [Reissue Additional Photos] – Michael Ochs Archives Producer – James William Guercio Remastered By [Reissue Remastering] – Dave Donnelly Research [Reissue Editorial Research] – Steven Chean Supervised By [Reissue Editorial Supervision] – Cory Frye Technician [Reissue Audio Supervision] – Jeff Magid Trombone – James Pankow Trumpet, Vocals – Lee Loughnane Vocals, Bass – Peter Cetera Vocals, Guitar – Terry Kath Vocals, Keyboards – Robert Lamm Woodwind, Vocals – Walter Parazaider Written-By – James Pankow Written-By – James William Guercio Written-By – Jimmy Miller Written-By – Robert Lamm Written-By – Steve Winwood Written-By – Terry Kath