Zerda, L. M. (1977). Urinary inorganic sulfate sulfur: Creating nine ratio in some Filipino pre-schoolars [microform]. Photoduplication Service, University of the Philippines Library.
芝加哥风格引文Zerda, Leticia Moran. Urinary Inorganic Sulfate Sulfur: Creating Nine Ratio in Some Filipino Pre-schoolars [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1977.
MLA引文Zerda, Leticia Moran. Urinary Inorganic Sulfate Sulfur: Creating Nine Ratio in Some Filipino Pre-schoolars [microform]. Photoduplication Service, University of the Philippines Library, 1977.
警告：这些引文格式不一定是100％准确.