Public Interest Research Group (Victoria), Cone, A., & Head, M. (1973). Pyramid selling in Victoria: An investigation.
Chicago-viite (17. p.)Public Interest Research Group (Victoria), Andrea Cone, ja Michael Head. Pyramid Selling in Victoria: An Investigation. [Claydon, Victoria], 1973.
MLA-viite (8. p.)Public Interest Research Group (Victoria), et al. Pyramid Selling in Victoria: An Investigation. 1973.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.