Cita APA (7th ed.)
Ridout, R. (1984). Puzzle it out: Grade 1 (2d. ed.). Bell & Hyman.
Cita Chicago (17th ed.)
Ridout, Ronald. Puzzle It Out: Grade 1. 2d. ed. London: Bell & Hyman, 1984.
Cita MLA (9th ed.)
Ridout, Ronald. Puzzle It Out: Grade 1. 2d. ed. Bell & Hyman, 1984.
Atenció: Aquestes cites poden no estar 100% correctes.