Deismireacht APA

Lapp, R. E. (1960). Roads to Discovery. New York: The New American Library.

Trích dẫn kiểu Chicago

Lapp, Ralph E. Roads to Discovery. New York: The New American Library, 1960.

Deismireacht MLA

Lapp, Ralph E. Roads to Discovery. New York: The New American Library, 1960.

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