APA (7th ed.) Citation

Roberts, B. (1950). Historical notes on Heard and McDonald Islands. Polar Record, 5(40), 580.

Chicago Style (17th ed.) Citation

Roberts, Brian. "Historical Notes on Heard and McDonald Islands." Polar Record 5, no. 40 (1950): 580.

MLA (9th ed.) Citation

Roberts, Brian. "Historical Notes on Heard and McDonald Islands." Polar Record, vol. 5, no. 40, 1950, p. 580.