APA

Puerto Rico, Autoridad de Acueductos y Alcantarillados de Puerto Rico, . (1960). Pollution survey of the Loiza River and its tributaries /cPerformed by Puerto Rico Aqueduct and Sewer Authority, Production. [n.p.]: .

Chicago

Puerto Rico, Autoridad de Acueductos y Alcantarillados de Puerto Rico, . 1960. Pollution survey of the Loiza River and its tributaries /cPerformed by Puerto Rico Aqueduct and Sewer Authority, Production. [n.p.]: .

Harvard

Puerto Rico, Autoridad de Acueductos y Alcantarillados de Puerto Rico, . (1960). Pollution survey of the Loiza River and its tributaries /cPerformed by Puerto Rico Aqueduct and Sewer Authority, Production. [n.p.]: .

MLA

Puerto Rico, Autoridad de Acueductos y Alcantarillados de Puerto Rico, . Pollution survey of the Loiza River and its tributaries /cPerformed by Puerto Rico Aqueduct and Sewer Authority, Production. [n.p.]: . 1960.