APA (7th ed.) Citation

Derdeyn, E., Perspecto Map Co, & Chicago Convention & Tourism Bureau. (1973). Picture map of downtown Chicago. Chicago Convention and Tourism Bureau.

Chicago Style (17th ed.) Citation

Derdeyn, Eugene, Perspecto Map Co, and Chicago Convention & Tourism Bureau. Picture Map of Downtown Chicago. [Chicago]: Chicago Convention and Tourism Bureau, 1973.

MLA (8th ed.) Citation

Derdeyn, Eugene, et al. Picture Map of Downtown Chicago. Chicago Convention and Tourism Bureau, 1973.