Cita APA (7a ed.)

Sprague, H. B. (1959). Grasslands. American Association for the Advancement of Science.

Cita Chicago Style (17a ed.)

Sprague, Howard B. Grasslands. Washington: American Association for the Advancement of Science, 1959.

Cita MLA (8a ed.)

Sprague, Howard B. Grasslands. American Association for the Advancement of Science, 1959.