Cita APA (7th ed.)

Hitchcock, A. S. (1935). Manual of the grasses of the United States. Department of Agriculture.

Cita Chicago (17th ed.)

Hitchcock, A. S. Manual of the Grasses of the United States. Washington, D.C, USA: Department of Agriculture, 1935.

Cita MLA (9th ed.)

Hitchcock, A. S. Manual of the Grasses of the United States. Department of Agriculture, 1935.