Παραπομπή σε μορφή APA (7η εκδ.)

Spevacek, V. (1966). Some Problems of Constructing The Long-Term Projection in Czechoslovakia. The institute of national planning.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Spevacek, Vojtech. Some Problems of Constructing The Long-Term Projection in Czechoslovakia. Cairo: The institute of national planning, 1966.

Παραπομπή σε μορφή MLA (9th εκδ.)

Spevacek, Vojtech. Some Problems of Constructing The Long-Term Projection in Czechoslovakia. The institute of national planning, 1966.