APA (7e ed.) Bronvermelding

Henson, M. A. (1973). The date of issue and of circulation of Philippine postage stamps 1854-1972 (2nd rev. ed.). s.n.].

Chicago (17e ed.) Bronvermelding

Henson, Mariano A. The Date of Issue and of Circulation of Philippine Postage Stamps 1854-1972. 2nd rev. ed. [Angeles City: s.n.], 1973.

MLA (9e ed.) Bronvermelding

Henson, Mariano A. The Date of Issue and of Circulation of Philippine Postage Stamps 1854-1972. 2nd rev. ed. s.n.], 1973.