APA (7th ed.) Citation

Erling, O., Pirinen, P. P., & Lassila, O. The ALLL environment-using object-oriented concepts in LISP.

Chicago Style (17th ed.) Citation

Erling, Orri, Pekka P. Pirinen, and Ora Lassila. The ALLL Environment-using Object-oriented Concepts in LISP.

MLA (9th ed.) Citation

Erling, Orri, et al. The ALLL Environment-using Object-oriented Concepts in LISP.

Warning: These citations may not always be 100% accurate.