APA (7th ed.) Citation

Porter, K. A. (1961). The time machine ([1st. ed., 6th. impr.].). Longman.

Chicago Style (17th ed.) Citation

Porter, Katherine Anne. The Time Machine. [1st. ed., 6th. impr.]. London: Longman, 1961.

MLA (9th ed.) Citation

Porter, Katherine Anne. The Time Machine. [1st. ed., 6th. impr.]. Longman, 1961.