Cita APA (7th ed.)

Herring, H. (1975). Guide to environmental resources. Smoothie Publications.

Cita Chicago (17th ed.)

Herring, Horace. Guide to Environmental Resources. Brighton: Smoothie Publications, 1975.

Cita MLA (8th ed.)

Herring, Horace. Guide to Environmental Resources. Smoothie Publications, 1975.