Cita APA (7th ed.)

Eckles, C. H., Combs, W. B., & Macy, H. (1951). Milk and milk productions (4a. ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Eckles, Clarence Henry, Willes Barnes Combs, i Harold Macy. Milk and Milk Productions. 4a. ed. Nueva York: McGraw-Hill, 1951.

Cita MLA (9th ed.)

Eckles, Clarence Henry, et al. Milk and Milk Productions. 4a. ed. McGraw-Hill, 1951.