Cita APA (7a ed.)

Hill, L. A. (1971). A fouth crossword puzzle book. Oxford University Press.

Cita Chicago Style (17a ed.)

Hill, Leslie A. A Fouth Crossword Puzzle Book. London: Oxford University Press, 1971.

Cita MLA (9a ed.)

Hill, Leslie A. A Fouth Crossword Puzzle Book. Oxford University Press, 1971.