APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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