Cita APA (7a ed.)

Hui, L. S., & Ong, P. S. (1987). Secondary school geography (Repr.). Pan Pacific Book Distributors [u.a.

Cita Chicago Style (17a ed.)

Hui, Lee Suat, y Pin Sam Ong. Secondary School Geography. Repr. Singapore: Pan Pacific Book Distributors [u.a, 1987.

Cita MLA (9a ed.)

Hui, Lee Suat, y Pin Sam Ong. Secondary School Geography. Repr. Pan Pacific Book Distributors [u.a, 1987.