The general format and example below refers to maps published as independent sheets.
The cartographer is listed in place of an author, followed by [, cartographer], and information on the map type is listed after the title, e.g., [topographic map].
If it is relevant, include a brief physical description of the map: the number of sheets, size, color or black and white, and scale.
Author(s) AA, cartographer(s). Date. Title of map [map type]. Place of publication (State or Province): publisher. Physical description.
(Doyon and Donovan 1992)
Doyon R, Donovan T, cartographers. 1992. AIDS in Massachusetts, 1985-1991 [demographic map]. Amherst (MA): University of Massachusetts, Department of Geology & Geography.