APA (7th ed.) Citation

Jacob, G., & Wiedemann, E. (1912). Zu Ὁmer-i-Chajjâm. Der Islam, 3(1), 42-62. doi:10.1515/islm.1912.3.1.42

Chicago Style (17th ed.) Citation

Jacob, G., and E. Wiedemann. "Zu Ὁmer-i-Chajjâm." Der Islam 3, no. 1 (1912): 42-62, https://doi.org/10.1515/islm.1912.3.1.42.

MLA (8th ed.) Citation

Jacob, G., and E. Wiedemann. "Zu Ὁmer-i-Chajjâm." Der Islam, vol. 3, no. 1, 1912, pp. 42-62, https://doi.org/10.1515/islm.1912.3.1.42.

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