MLA

Railways, South African. Standard Railway Map of South Africa / Drawn in the Office of the Chief Civil Engineer, S.A.R., Johannesburg. Government Printing Works, 0AD. https://collections.library.yale.edu/catalog/15827265.

APA, 6th edition

Railways, S. A. (0 C.E.). Standard railway map of South Africa / drawn in the office of the Chief Civil Engineer, S.A.R., Johannesburg. [Maps]. Government Printing Works, https://collections.library.yale.edu/catalog/15827265.