Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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