APA-viite (7. p.)

Van Zyl, D. (1967). The geology of the O'okiep Copper Mine, Namaqualand. [University of Stellenbosch].

Chicago-viite (17. p.)

Van Zyl, D. The Geology of the O'okiep Copper Mine, Namaqualand. Stellenbosch: [University of Stellenbosch], 1967.

MLA-viite (8. p.)

Van Zyl, D. The Geology of the O'okiep Copper Mine, Namaqualand. [University of Stellenbosch], 1967.