APA (7e ed.) Bronvermelding

Longwood, F. R. (1961). Puerto rican woods: Their machining, seasoning and related characteristics. U.S. Government Printing.

Chicago (17e ed.) Bronvermelding

Longwood, Franklin R. Puerto Rican Woods: Their Machining, Seasoning and Related Characteristics. Washington, D.C.: U.S. Government Printing, 1961.

MLA (9e ed.) Bronvermelding

Longwood, Franklin R. Puerto Rican Woods: Their Machining, Seasoning and Related Characteristics. U.S. Government Printing, 1961.