Dyfyniad APA

Betts, P. W. (1973). Supervisory studies. Macdonald and Evans.

Dyfyniad Arddull Chicago

Betts, Peter W. Supervisory Studies. Macdonald and Evans, 1973.

Dyfyniad MLA

Betts, Peter W. Supervisory Studies. Macdonald and Evans, 1973.

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