APA (7th ed.) Citation

Schurmann, A. (1975). On portability of abstract programming systems. PKIN.

Chicago Style (17th ed.) Citation

Schurmann, Alfred. On Portability of Abstract Programming Systems. Warsaw: PKIN, 1975.

MLA (8th ed.) Citation

Schurmann, Alfred. On Portability of Abstract Programming Systems. PKIN, 1975.

Warning: These citations may not always be 100% accurate.