Παραπομπή APA

Ashour,S. (1972). Sequencing theory. Springer - Verlag.

Παραπομπή Chicago Style

Ashour,S. Sequencing Theory. Berlin: Springer - Verlag, 1972.

Παραπομπή MLA

Ashour,S. Sequencing Theory. Springer - Verlag, 1972.