Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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