Παραπομπή APA

Mehra, J. (1974). Einstein, Hilbert and the theory of gravitation. D Reidel.

Παραπομπή Chicago Style

Mehra, Jagdish. Einstein, Hilbert and the Theory of Gravitation. Dordecht: D Reidel, 1974.

Παραπομπή MLA

Mehra, Jagdish. Einstein, Hilbert and the Theory of Gravitation. D Reidel, 1974.