APA (7th ed.) Citation

F, P. G. (1968). [Determination of environmental radioactivity]. Revista ecuatoriana de higiene y medicina tropical, 25(1), 31.

Chicago Style (17th ed.) Citation

F, Parra Gil. "[Determination of Environmental Radioactivity]." Revista Ecuatoriana De Higiene Y Medicina Tropical 25, no. 1 (1968): 31.

MLA (9th ed.) Citation

F, Parra Gil. "[Determination of Environmental Radioactivity]." Revista Ecuatoriana De Higiene Y Medicina Tropical, vol. 25, no. 1, 1968, p. 31.