Dyfyniad APA

Van Ggch, J. P. (1974). Applied general system theory. Harper and row.

Dyfyniad Arddull Chicago

Van Ggch, John P. Applied General System Theory. NewYork: Harper and row, 1974.

Dyfyniad MLA

Van Ggch, John P. Applied General System Theory. Harper and row, 1974.

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