Gaya APA

Veen, L, K, &, J, D. (1981). Guide to the Training of Supervisors: for Labour-Based Road Construction and Maintenance (Part 2) (-). Switzerland: International Labour Organisation.

Gaya MLA

Veen, L.S., Karlsson, &, J.J., De. "Guide to the Training of Supervisors: for Labour-Based Road Construction and Maintenance (Part 2)". - Switzerland: International Labour Organisation, 1981. Text.