Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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