McGregor, R. C. A Manual of Philippine Birds.
Chicago Style (17. basım) AtıfMcGregor, Richard C. A Manual of Philippine Birds.
MLA (9th ed.) AtıfMcGregor, Richard C. A Manual of Philippine Birds.
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McGregor, R. C. A Manual of Philippine Birds.
Chicago Style (17. basım) AtıfMcGregor, Richard C. A Manual of Philippine Birds.
MLA (9th ed.) AtıfMcGregor, Richard C. A Manual of Philippine Birds.