Cita APA

Hitchcock, A. S. 1., & Hitchcock, A. S. 1. (1935). Manual of the grasses of the United States. Washington: U.S.G.P.O..

Citación estilo Chicago

Hitchcock, Albert Spear 1865-1935, y Albert Spear 1865-1935 Hitchcock. Manual of the Grasses of the United States. Washington: U.S.G.P.O., 1935.

Cita MLA

Hitchcock, Albert Spear 1865-1935, y Albert Spear 1865-1935 Hitchcock. Manual of the Grasses of the United States. Washington: U.S.G.P.O., 1935.