APA (7th ed.) Citation

Christodulu, D. C. Mathematical problems of general relativity. European Mathematical Society.

Chicago Style (17th ed.) Citation

Christodulu, Dēmētrēs Ch. Mathematical Problems of General Relativity. Zürich: European Mathematical Society.

MLA (9th ed.) Citation

Christodulu, Dēmētrēs Ch. Mathematical Problems of General Relativity. European Mathematical Society.

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