Allen, J. L. (1995). Environment 95/96 (14th.ed.). Brown and Benchmark Publishers.
Tohutoru Kātū Chicago (17th ed.)Allen, John L. Environment 95/96. 14th.ed. Connecticut: Brown and Benchmark Publishers, 1995.
Tohutoro MLA (9th ed.)Allen, John L. Environment 95/96. 14th.ed. Brown and Benchmark Publishers, 1995.
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