APA

Semmelink C., . (1985). Findings of research on the rational design of single and double seals. Pretoria: National Institute for Transport and Road Research.

Chicago

Semmelink CJ, . 1985. Findings of research on the rational design of single and double seals. Pretoria: National Institute for Transport and Road Research.

Harvard

Semmelink C., . (1985). Findings of research on the rational design of single and double seals. Pretoria: National Institute for Transport and Road Research.

MLA

Semmelink CJ, . Findings of research on the rational design of single and double seals. Pretoria: National Institute for Transport and Road Research. 1985.