APA ציטוט

Helgeson, E. A. (1957). Methods of weed control. Food and Agriculture Organization of the United Nations.

Chicago Style (17th ed.) Citation

Helgeson, Earl A. Methods of Weed Control. Rome: Food and Agriculture Organization of the United Nations, 1957.

ציטוט MLA

Helgeson, Earl A. Methods of Weed Control. Food and Agriculture Organization of the United Nations, 1957.