APA (7th ed.) Citation

Ferreira, M. R., Proença, J. F., & Proença, T. (2013). Motivations in volunteer work.

Chicago Style (17th ed.) Citation

Ferreira, Marisa R., João F. Proença, and Teresa Proença. Motivations in Volunteer Work. 2013.

MLA (8th ed.) Citation

Ferreira, Marisa R., et al. Motivations in Volunteer Work. 2013.