American Psychological Association 6th edition

Marcotty, M., & Ledgard, H. [ca. 1987]. The world of programming languages. In Springer books on professional computing [Book]. New York [u.a.]: Springer.

ISO-690 (author-date, English)

MARCOTTY, Michael und LEDGARD, Henry, 1987. The world of programming languages. New York [u.a.]: Springer. ISBN 3540964401.

Modern Language Association 9th edition

Marcotty, M., und H. Ledgard. „The world of programming languages“. Springer books on professional computing, book, Springer, 1987.

Mohr Siebeck - Recht (Deutsch - Österreich)

Marcotty, Michael/Ledgard, Henry: The world of programming languages, New York [u.a.] 1987.

Emerald - Harvard

Marcotty, M. und Ledgard, H. (1987), The world of programming languages, Springer books on professional computing, Bd. , Springer, New York [u.a.].

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.