APA-referens (7:e uppl.)

Yulius, Y., Salim, H. L., & Ramdhan, M. (2016). Spatial Pattern of Bathymetry in Wangi-Wangi Island and Its Surrounding Based on GEBCO Data and Nautical Map. Universitas Muhammadiyah Surakarta.

Chicago-referens (17:e uppl.)

Yulius, Yulius, H L. Salim, och M. Ramdhan. Spatial Pattern of Bathymetry in Wangi-Wangi Island and Its Surrounding Based on GEBCO Data and Nautical Map. Universitas Muhammadiyah Surakarta, 2016.

MLA-referens (9:e uppl.)

Yulius, Yulius, et al. Spatial Pattern of Bathymetry in Wangi-Wangi Island and Its Surrounding Based on GEBCO Data and Nautical Map. Universitas Muhammadiyah Surakarta, 2016.