APA (7th ed.) Citation

Perna, F. (1938). Experiments in the process of dry purification. Gas Journal, 221, 184.

Chicago Style (17th ed.) Citation

Perna, F. "Experiments in the Process of Dry Purification." Gas Journal 221 (1938): 184.

MLA (9th ed.) Citation

Perna, F. "Experiments in the Process of Dry Purification." Gas Journal, vol. 221, 1938, p. 184.

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