Hawkins, J., Hughes, C., & Scotland, R. (1997). Primary homology assessment, characters and character states.
Chicago Style (17. basım) AtıfHawkins, J., C. Hughes, ve R. Scotland. Primary Homology Assessment, Characters and Character States. 1997.
MLA (9th ed.) AtıfHawkins, J., et al. Primary Homology Assessment, Characters and Character States. 1997.
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