Dyfyniad APA

DUYN, J. V. (1975). Practical Systems And Procedures Manual J. Van Duyn. Reston Publising.

Dyfyniad Arddull Chicago

DUYN, J. Van. Practical Systems And Procedures Manual J. Van Duyn. Reston Publising, 1975.

Dyfyniad MLA

DUYN, J. Van. Practical Systems And Procedures Manual J. Van Duyn. Reston Publising, 1975.

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