Cita APA (7a ed.)
International Correspondence Schools. Reference Library. Water Supply, Sewerage, Purification of Water, Sewage Purification and Disposal, Irrigation. International Textbook.
Cita estilo Chicago (17a ed.)
International Correspondence Schools. Reference Library. Water Supply, Sewerage, Purification of Water, Sewage Purification and Disposal, Irrigation. Scranton, EUA: International Textbook.
Cita MLA (9a ed.)
International Correspondence Schools. Reference Library. Water Supply, Sewerage, Purification of Water, Sewage Purification and Disposal, Irrigation. International Textbook.
Precaución: Estas citas no son 100% exactas.