Kim Song, T., & Suat Hui, L. (1988). Secondary school geography: Express course (1. publ. 1985, repr.). Pan Pacific Book Distributors Curriculum Development Institute of Singapore.
Citazione stile Chigago Style (17a edizione)Kim Song, Tan, e Lee Suat Hui. Secondary School Geography: Express Course. 1. publ. 1985, repr. Singapore: Pan Pacific Book Distributors Curriculum Development Institute of Singapore, 1988.
Citatione MLA (9a ed.)Kim Song, Tan, e Lee Suat Hui. Secondary School Geography: Express Course. 1. publ. 1985, repr. Pan Pacific Book Distributors Curriculum Development Institute of Singapore, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.