South African Council for Scientific and Industrial Research. Directory of scientific and technical periodicals published in South Africa: Gids van wetenskaplike en tegniese tydskrifte in Suid-Afrika uitgegee. Publishing Division of the Council for Scientific and Industrial Research].
Παραπομπή σε μορφή Chicago (17η εκδ.)South African Council for Scientific and Industrial Research. Directory of Scientific and Technical Periodicals Published in South Africa: Gids Van Wetenskaplike En Tegniese Tydskrifte in Suid-Afrika Uitgegee. [Pretoria: Publishing Division of the Council for Scientific and Industrial Research].
Παραπομπή σε μορφή MLA (8th εκδ.)South African Council for Scientific and Industrial Research. Directory of Scientific and Technical Periodicals Published in South Africa: Gids Van Wetenskaplike En Tegniese Tydskrifte in Suid-Afrika Uitgegee. Publishing Division of the Council for Scientific and Industrial Research].