Cita APA (7th ed.)

Roddy, H. J., & Gibbs, D. (1904). Philippine school geography. American Book.

Cita Chicago (17th ed.)

Roddy, Henry Justin, i David Gibbs. Philippine School Geography. New York: American Book, 1904.

Cita MLA (9th ed.)

Roddy, Henry Justin, i David Gibbs. Philippine School Geography. American Book, 1904.