APA

Koole R., Valhering C. & Stapel F. (1990). Development of pavement design program for use on personal computer. London: Shell Supply and Marketing Publication SM/M/90/16.

Chicago

Koole RC, Valhering CP and Stapel FDR. 1990. Development of pavement design program for use on personal computer. London: Shell Supply and Marketing Publication SM/M/90/16.

Harvard

Koole R., Valhering C. and Stapel F. (1990). Development of pavement design program for use on personal computer. London: Shell Supply and Marketing Publication SM/M/90/16.

MLA

Koole RC, Valhering CP and Stapel FDR. Development of pavement design program for use on personal computer. London: Shell Supply and Marketing Publication SM/M/90/16. 1990.