APA-referens (7:e uppl.)

Gottner, H. R. (1968). On The Planning Method "PERT" and its Application in the GDR. The Institute of National Planning.

Chicago-referens (17:e uppl.)

Gottner, Habil Reinhard. On The Planning Method "PERT" and Its Application in the GDR. Cairo: The Institute of National Planning, 1968.

MLA-referens (9:e uppl.)

Gottner, Habil Reinhard. On The Planning Method "PERT" and Its Application in the GDR. The Institute of National Planning, 1968.

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