Gaya APA

Walker, D, H, T., Rowlinson, S. (2018). Procurement Systems; A cross-industry project managementrnperspective . London & New York: Taylor & Francis Inc..

Gaya MLA

Walker, Derek, H., T.., Rowlinson, Steve. "Procurement Systems; A cross-industry project managementrnperspective". London & New York: Taylor & Francis Inc., 2018. Text.