Cita APA

Little, E. L. 1., & Wadsworth, F. H. (1964). Common trees of Puerto Rico and the Virgin Islands. Washington: U.S. Departamento of Agriculture, Forest Service.

Citación estilo Chicago

Little, Elbert Luther 1907-2004, y Frank Howard Wadsworth. Common Trees of Puerto Rico and the Virgin Islands. Washington: U.S. Departamento of Agriculture, Forest Service, 1964.

Cita MLA

Little, Elbert Luther 1907-2004, y Frank Howard Wadsworth. Common Trees of Puerto Rico and the Virgin Islands. Washington: U.S. Departamento of Agriculture, Forest Service, 1964.