Citazione Stile APA (7a Edizione)

Schonell, F. J., & Nickless, W. (1978). The Happy venture playbooks (First published 1951, re-illustrated 1962, rev. ed. 1971, 5th impression.). Oliver and Boyd.

Citazione stile Chigago Style (17a edizione)

Schonell, Fred J., e Will Nickless. The Happy Venture Playbooks. First published 1951, re-illustrated 1962, rev. ed. 1971, 5th impression. Edinburgh: Oliver and Boyd, 1978.

Citatione MLA (9a ed.)

Schonell, Fred J., e Will Nickless. The Happy Venture Playbooks. First published 1951, re-illustrated 1962, rev. ed. 1971, 5th impression. Oliver and Boyd, 1978.