Gaya APA

Kiong, H, Y. (). Longman A-Level Couerse in Biology, Sillabus Vol.1 for AS and A-Level . Singapura: Longman.

Gaya MLA

Kiong, How, Yin. "Longman A-Level Couerse in Biology, Sillabus Vol.1 for AS and A-Level". Singapura: Longman, . Text.