Cita APA (7a ed.)

Watcyn-Jones, P. (1992). It's crossword time! Penguin Books.

Cita Chicago Style (17a ed.)

Watcyn-Jones, Peter. It's Crossword Time! London [etc.]: Penguin Books, 1992.

Cita MLA (9a ed.)

Watcyn-Jones, Peter. It's Crossword Time! Penguin Books, 1992.