Frost, J. R. (1990). Wetlands preservation: An information & action guide. Washington State Dept. of Ecology.
Cita Chicago Style (17a ed.)Frost, Jane Rubey. Wetlands Preservation: An Information & Action Guide. [Olympia, Wash.]: Washington State Dept. of Ecology, 1990.
Cita MLA (8a ed.)Frost, Jane Rubey. Wetlands Preservation: An Information & Action Guide. Washington State Dept. of Ecology, 1990.
Precaución: Estas citas no son 100% exactas.