APA (7th ed.) Citation

England, W. B. (1971). Sistemas de compras. Ateneo.

Chicago Style (17th ed.) Citation

England, Wilbur B. Sistemas De Compras. Buenos Aires [etc.]: Ateneo, 1971.

MLA (9th ed.) Citation

England, Wilbur B. Sistemas De Compras. Ateneo, 1971.

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