APA (7th ed.) Citation

Marshall, A., & Guillebaud, C. W. (1961). Principles of economics (9th (variorum) ed. / with annotations by C.W. Guillebaud.). Macmillan.

Chicago Style (17th ed.) Citation

Marshall, Alfred, and Claude William Guillebaud. Principles of Economics. 9th (variorum) ed. / with annotations by C.W. Guillebaud. London [etc.]: Macmillan, 1961.

MLA (9th ed.) Citation

Marshall, Alfred, and Claude William Guillebaud. Principles of Economics. 9th (variorum) ed. / with annotations by C.W. Guillebaud. Macmillan, 1961.

Warning: These citations may not always be 100% accurate.