APA (7th ed.) Citation

Fahrenwald, A. W. (1925). Present trend in flotation flow-sheets and classification of flotation feed. [publisher not identified].

Chicago Style (17th ed.) Citation

Fahrenwald, A. W. Present Trend in Flotation Flow-sheets and Classification of Flotation Feed. Washington, D.C.: [publisher not identified], 1925.

MLA (9th ed.) Citation

Fahrenwald, A. W. Present Trend in Flotation Flow-sheets and Classification of Flotation Feed. [publisher not identified], 1925.