Lawden, D. F. (1967). An introduction to Tensor Calculus and Relativity: Methuen`s monographs an Physical subjects. s.n.
Cita Chicago (17th ed.)Lawden, Derek F. An Introduction to Tensor Calculus and Relativity: Methuen`s Monographs an Physical Subjects. Londres: s.n, 1967.
Cita MLA (9th ed.)Lawden, Derek F. An Introduction to Tensor Calculus and Relativity: Methuen`s Monographs an Physical Subjects. s.n, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.