APA način citiranja

Calcagni, G., Papantonopoulos, L., Siopsis, G., & Tsamis, N. (2012). Quantum gravity and quantum cosmology. Springer.

Čikaški stil citiranja

Calcagni, Gianluca., Lefteris Papantonopoulos, George Siopsis, i Nikos Tsamis. Quantum Gravity and Quantum Cosmology. New York: Springer, 2012.

MLA način citiranja

Calcagni, Gianluca., et al. Quantum Gravity and Quantum Cosmology. Springer, 2012.