S ÜLKER. . Turk J Oncol. 1989 ;4(4):917-922. doi: .
S ÜLKER. . Turk J Oncol. 1989;4(4):917-922. doi:
S ÜLKER, (1989). . Turkish Journal of Oncology, 4(4), 917-922. https://doi.org/
S ÜLKER,. "." Turkish Journal of Oncology, vol. 4, no. 4, 1989, pp. 917-922. https://doi.org/.
S ÜLKER,. 1989. "." Turkish Journal of Oncology 4, no. 4: 917-922. https://doi.org/.