Frey, D. G. (1974). A limnological reconnaisance of lake Lanao. University Research Center, Mindanao State University.
Chicagoスタイル(17版)引用形式Frey, David G. A Limnological Reconnaisance of Lake Lanao. Marawi City: University Research Center, Mindanao State University, 1974.
MLA(9版)引用形式Frey, David G. A Limnological Reconnaisance of Lake Lanao. University Research Center, Mindanao State University, 1974.
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