APA (7th ed.) Citation

Joe Armstrong & Associates & Allegan County Road Commission. (1978). 1978 official map of Allegan County, Michigan. Allegan County Road Commission.

Chicago Style (17th ed.) Citation

Joe Armstrong & Associates and Allegan County Road Commission. 1978 Official Map of Allegan County, Michigan. [Allegan]: Allegan County Road Commission, 1978.

MLA (9th ed.) Citation

Joe Armstrong & Associates and Allegan County Road Commission. 1978 Official Map of Allegan County, Michigan. Allegan County Road Commission, 1978.