APA-viite (7. p.)

Shields, J. T., & Gray, R. C. (1971). The fertilizer industry in the Philippines. National Fertilizer Development Center, Tennessee Valley Authority.

Chicago-viite (17. p.)

Shields, John T., ja Robert C. Gray. The Fertilizer Industry in the Philippines. [Muscle Shoals, Ala: National Fertilizer Development Center, Tennessee Valley Authority, 1971.

MLA-viite (9. p.)

Shields, John T., ja Robert C. Gray. The Fertilizer Industry in the Philippines. National Fertilizer Development Center, Tennessee Valley Authority, 1971.