Παραπομπή APA

Pohl, R. W. (1954). How to know the grasses: Pictured-keys for determining the common and important American grasses with suggestions and aids for their study. Dubuque, IA: Brown.

Παραπομπή Chicago Style

Pohl, Richard W. How to Know the Grasses: Pictured-keys for Determining the Common and Important American Grasses With Suggestions and Aids for Their Study. Dubuque, IA: Brown, 1954.

Παραπομπή MLA

Pohl, Richard W. How to Know the Grasses: Pictured-keys for Determining the Common and Important American Grasses With Suggestions and Aids for Their Study. Dubuque, IA: Brown, 1954.

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