American Psychological Association 7th edition

Gubbay, L. (o. J.). Two worlds (2. ed.) [Book]. Chroniclers.

Chicago Manual of Style 17th edition (author-date)

Gubbay, Lucien. o. J. Two worlds. Book. 2. ed. London: Chroniclers.

Springer - Basic (author-date)

Gubbay L Two worlds, 2. ed. Chroniclers, London

Springer - Lecture Notes in Computer Science

1.Gubbay, L.: Two worlds. Chroniclers, London.

DIN 1505-2 (author-date, Deutsch) - standard superseded by ISO-690

Gubbay, Lucien ; ; ; : Two worlds. 2. ed.. book. London : Chroniclers

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