Παραπομπή σε μορφή APA (7η εκδ.)

Philippines. (1921). Internal Revenue Laws of The Philippine Islands In Force and Effect July 1, 1921. WEL Collection.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Philippines. Internal Revenue Laws of The Philippine Islands In Force and Effect July 1, 1921. [S.l.]: WEL Collection, 1921.

Παραπομπή σε μορφή MLA (9th εκδ.)

Philippines. Internal Revenue Laws of The Philippine Islands In Force and Effect July 1, 1921. WEL Collection, 1921.