Cita APA (7th ed.)

Pitard, F. F. (1993). Pierre Gy's sampling theory and sampling practice: Heterogeneity, sampling correctness, and statistical process control (2nd ed.). CRC Press.

Cita Chicago (17th ed.)

Pitard, Francis F. Pierre Gy's Sampling Theory and Sampling Practice: Heterogeneity, Sampling Correctness, and Statistical Process Control. 2nd ed. Boca Raton, Fla: CRC Press, 1993.

Cita MLA (9th ed.)

Pitard, Francis F. Pierre Gy's Sampling Theory and Sampling Practice: Heterogeneity, Sampling Correctness, and Statistical Process Control. 2nd ed. CRC Press, 1993.