Tohutoro APA (7th ed.)

SANDERS, H. e. (1966). Cooperative extension service. Prentice -Hall.

Tohutoru Kātū Chicago (17th ed.)

SANDERS, H.C. ed. Cooperative Extension Service. New Jersey: Prentice -Hall, 1966.

Tohutoro MLA (9th ed.)

SANDERS, H.C. ed. Cooperative Extension Service. Prentice -Hall, 1966.