APA (7th ed.) Citation

Koopman, B. O. (1972). Air-Terminal Queues under Time-Dependent Conditions. Operations Research, 20(6), 1089. https://doi.org/10.1287/opre.20.6.1089

Chicago Style (17th ed.) Citation

Koopman, Bernard O. "Air-Terminal Queues Under Time-Dependent Conditions." Operations Research 20, no. 6 (1972): 1089. https://doi.org/10.1287/opre.20.6.1089.

MLA (9th ed.) Citation

Koopman, Bernard O. "Air-Terminal Queues Under Time-Dependent Conditions." Operations Research, vol. 20, no. 6, 1972, p. 1089, https://doi.org/10.1287/opre.20.6.1089.