APA (7th ed.) Citation

Lester, D. (1994). Challenges in Preventing Suicide. Death studies, 18(6), 623-639.

Chicago Style (17th ed.) Citation

Lester, David. "Challenges in Preventing Suicide." Death Studies 18, no. 6 (1994): 623-639.

MLA (8th ed.) Citation

Lester, David. "Challenges in Preventing Suicide." Death Studies, vol. 18, no. 6, 1994, pp. 623-639.