APA (7th ed.) Citation

Powell, N. W. (1933). Practical preparations. The Scientific Press.

Chicago Style (17th ed.) Citation

Powell, N. W. Practical Preparations. London: The Scientific Press, 1933.

MLA (9th ed.) Citation

Powell, N. W. Practical Preparations. The Scientific Press, 1933.

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