APA (7th ed.) Citation

Torrey, A. (1980). The Gregorian missionary methods. Missiology, 8(1), 99-103.

Chicago Style (17th ed.) Citation

Torrey, Archer. "The Gregorian Missionary Methods." Missiology 8, no. 1 (1980): 99-103.

MLA (9th ed.) Citation

Torrey, Archer. "The Gregorian Missionary Methods." Missiology, vol. 8, no. 1, 1980, pp. 99-103.

Warning: These citations may not always be 100% accurate.