APA-viite (7. p.)

Gareis, R. &. O. (2013). Project management and sustanable development principles. Project management institute.

Chicago-viite (17. p.)

Gareis, Ronald & Other. Project Management and Sustanable Development Principles. Pennsylvania: Project management institute, 2013.

MLA-viite (9. p.)

Gareis, Ronald & Other. Project Management and Sustanable Development Principles. Project management institute, 2013.