Cita APA (7a ed.)
Calcagni, G. Quantum Gravity and Quantum Cosmology. Springer.
Cita estilo Chicago (17a ed.)
Calcagni, Gianluca. Quantum Gravity and Quantum Cosmology. Berlín, Alemania: Springer.
Cita MLA (9a ed.)
Calcagni, Gianluca. Quantum Gravity and Quantum Cosmology. Springer.
警告：這些引文格式不一定是100％准確.