Cita APA (7th ed.)

Buttfield, K., & East, A. (1993). Let's drill. Select Squash Centres Co-operative.

Cita Chicago (17th ed.)

Buttfield, Kim, i Alan East. Let's Drill. Perth, W.A.: Select Squash Centres Co-operative, 1993.

Cita MLA (8th ed.)

Buttfield, Kim, i Alan East. Let's Drill. Select Squash Centres Co-operative, 1993.