APA (7th ed.) Citation

Viswanathan, A. C., Hitchings, R. A., & Fitzke, F. W. (1997). How often do patients need visual field tests? Graefe's Archive for Clinical and Experimental Ophthalmology, 235(9), 563-568. https://doi.org/10.1007/bf00947085

Chicago Style (17th ed.) Citation

Viswanathan, Ananth C., Roger A. Hitchings, and Fred W. Fitzke. "How Often Do Patients Need Visual Field Tests?" Graefe's Archive for Clinical and Experimental Ophthalmology 235, no. 9 (1997): 563-568. https://doi.org/10.1007/bf00947085.

MLA (9th ed.) Citation

Viswanathan, Ananth C., et al. "How Often Do Patients Need Visual Field Tests?" Graefe's Archive for Clinical and Experimental Ophthalmology, vol. 235, no. 9, 1997, pp. 563-568, https://doi.org/10.1007/bf00947085.