Lua APA (7ú heag.)

Strahler, A. N. (1976). Principles of earth science. Harper & Row.

Lua i Stíl Chicago (17ú heag.)

Strahler, Arthur Newell. Principles of Earth Science. New York: Harper & Row, 1976.

Lua MLA (9ú heag.)

Strahler, Arthur Newell. Principles of Earth Science. Harper & Row, 1976.

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