APA (7th ed.) Citation

Egli, E., & Schulthess, E. (1981). Schweiz: Swissair flugbild (4a. ed.). Artemis.

Chicago Style (17th ed.) Citation

Egli, Emil, and Emil Schulthess. Schweiz: Swissair Flugbild. 4a. ed. Zurich: Artemis, 1981.

MLA (9th ed.) Citation

Egli, Emil, and Emil Schulthess. Schweiz: Swissair Flugbild. 4a. ed. Artemis, 1981.