Society of Wetland Scientists Professional Certification Program. (1998). Registry of professional wetland scientists: 1997-1998. U.S.A: The Program.
Citação norma ChicagoSociety of Wetland Scientists Professional Certification Program. Registry of Professional Wetland Scientists: 1997-1998. U.S.A: The Program, 1998.
Citação norma MLASociety of Wetland Scientists Professional Certification Program. Registry of Professional Wetland Scientists: 1997-1998. U.S.A: The Program, 1998.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.