Green, M. (1991). String theory and quantum gravity: Proceedings of the Trieste Spring School, 23 April-1 May 1990. World Scientific.
Chicago-viite (17. p.)Green, M. String Theory and Quantum Gravity: Proceedings of the Trieste Spring School, 23 April-1 May 1990. Singapore, Teaneck, N.J: World Scientific, 1991.
MLA-viite (9. p.)Green, M. String Theory and Quantum Gravity: Proceedings of the Trieste Spring School, 23 April-1 May 1990. World Scientific, 1991.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.