McGowan, D. J. (1992). What is an ecosystem? Encyclopedia Britannica Educational Corporation.
Style de citation Chicago (17e éd.)McGowan, David J. What Is an Ecosystem? Chicago: Encyclopedia Britannica Educational Corporation, 1992.
Style de citation MLA (9e éd.)McGowan, David J. What Is an Ecosystem? Encyclopedia Britannica Educational Corporation, 1992.
Attention : ces citations peuvent ne pas être correctes à 100%.