Cita APA (7th ed.)

Hill, L. A., & Popkin, P. R. (1985). A third crossword puzzle book. Oxford University Press.

Cita Chicago (17th ed.)

Hill, L. A., i P. R. Popkin. A Third Crossword Puzzle Book. Oxford: Oxford University Press, 1985.

Cita MLA (9th ed.)

Hill, L. A., i P. R. Popkin. A Third Crossword Puzzle Book. Oxford University Press, 1985.