APA Style

Yung, Y, (, W, S. (1987). Certificate Geography for Hongkong Volume 1 (-). Hongkong: Hongkong: Victoria Educational Press,.

MLA Style

Yung, Y.K, (dan, W.I, Siu). "Certificate Geography for Hongkong Volume 1". - Hongkong: Hongkong: Victoria Educational Press,, 1987. Universitas.