APA (7th ed.) Citation

Weems, P. V. H., & Zweng, C. A. (1957). Supplement to Instrument Flying: A typical cross-country written examination for the instrument rating (6. ed.). Waverly Press.

Chicago Style (17th ed.) Citation

Weems, Philip Van Horn, and Charles A. Zweng. Supplement to Instrument Flying: A Typical Cross-country Written Examination for the Instrument Rating. 6. ed. Baltimore: Waverly Press, 1957.

MLA (9th ed.) Citation

Weems, Philip Van Horn, and Charles A. Zweng. Supplement to Instrument Flying: A Typical Cross-country Written Examination for the Instrument Rating. 6. ed. Waverly Press, 1957.