Tohutoro APA (7th ed.)

Gangstad, E. O. (1978). Weed Control methods for River basin management. Fla, CRC.

Tohutoru Kātū Chicago (17th ed.)

Gangstad, Edward O. Weed Control Methods for River Basin Management. West Palm Beach: Fla, CRC, 1978.

Tohutoro MLA (9th ed.)

Gangstad, Edward O. Weed Control Methods for River Basin Management. Fla, CRC, 1978.