Gaya APA
Walker, George. ().
Doctoral education in the United States of America .
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Gaya Chicago
Walker, George.
Doctoral education in the United States of America.
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Text.
Gaya MLA
Walker, George.
Doctoral education in the United States of America.
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Text.
Gaya Turabian
Walker, George.
Doctoral education in the United States of America.
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.
Print.