Soroñgon, R. G. (1983). The first guide to climbing Mt. Apo.
芝加哥风格引文Soroñgon, Reynaldo G. The First Guide to Climbing Mt. Apo. Davao City, National Media Production Center, 1983.
MLA引文Soroñgon, Reynaldo G. The First Guide to Climbing Mt. Apo. 1983.
警告：这些引文格式不一定是100％准确.