APA-viite (7. p.)

Simpson, R., Johnstone, D., Nutter, D., Ward-Thompson, D., & Whitworth, A. (2011). The initial conditions of isolated star formation - X. A suggested evolutionary diagram for pre-stellar cores.

Chicago-viite (17. p.)

Simpson, R., D. Johnstone, D. Nutter, D. Ward-Thompson, ja A. Whitworth. The Initial Conditions of Isolated Star Formation - X. A Suggested Evolutionary Diagram for Pre-stellar Cores. 2011.

MLA-viite (9. p.)

Simpson, R., et al. The Initial Conditions of Isolated Star Formation - X. A Suggested Evolutionary Diagram for Pre-stellar Cores. 2011.