Cita APA (7th ed.)

Ray, R. P., & Ray, M. W. (1973). Practical estate duty planning (2nd ed.). Butterworths.

Cita Chicago (17th ed.)

Ray, Ralph P., i Margaret W. Ray. Practical Estate Duty Planning. 2nd ed. London: Butterworths, 1973.

Cita MLA (8th ed.)

Ray, Ralph P., i Margaret W. Ray. Practical Estate Duty Planning. 2nd ed. Butterworths, 1973.