Vangnai, S. (1977). Microbial transformation of sulfur in soil [microform]. Photoduplication Service. University of the Philippines Library.
Цитирование в стиле Чикаго (17-е изд.)Vangnai, Somsak. Microbial Transformation of Sulfur in Soil [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
Цитирование MLA (9-е изд.)Vangnai, Somsak. Microbial Transformation of Sulfur in Soil [microform]. Photoduplication Service. University of the Philippines Library, 1977.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.