APA (7th ed.) Citation

Ruhemann, M. (1949). The separation of gases (2a. ed.). Oxford University.

Chicago Style (17th ed.) Citation

Ruhemann, M. The Separation of Gases. 2a. ed. Oxford: Oxford University, 1949.

MLA (9th ed.) Citation

Ruhemann, M. The Separation of Gases. 2a. ed. Oxford University, 1949.