Van Nostrand, J., & Wilson, J. G. (1983). Rural ventilated improved pit latrines: A field manual for Botswana.
Cita Chicago Style (17a ed.)Van Nostrand, John, y James G. Wilson. Rural Ventilated Improved Pit Latrines: A Field Manual for Botswana. Washington, D.C. : World Bank, 1983.
Cita MLA (9a ed.)Van Nostrand, John, y James G. Wilson. Rural Ventilated Improved Pit Latrines: A Field Manual for Botswana. 1983.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.