Citazione Stile APA (7a Edizione)

Roberts, F. S. (1976). Discrete mathematical models, with applications to social, biological, and environmental problems. Prentice-Hall.

Citazione stile Chigago Style (17a edizione)

Roberts, Fred S. Discrete Mathematical Models, with Applications to Social, Biological, and Environmental Problems. Englewood Cliffs, N.J: Prentice-Hall, 1976.

Citatione MLA (9a ed.)

Roberts, Fred S. Discrete Mathematical Models, with Applications to Social, Biological, and Environmental Problems. Prentice-Hall, 1976.