Cita APA (7th ed.)

Hepple, B., & O' Higgins, P. (1972). Encyclopedia of labour relations law. Sweet & Maxwell.

Cita Chicago (17th ed.)

Hepple, B.A, i Paul O' Higgins. Encyclopedia of Labour Relations Law. London: Sweet & Maxwell, 1972.

Cita MLA (9th ed.)

Hepple, B.A, i Paul O' Higgins. Encyclopedia of Labour Relations Law. Sweet & Maxwell, 1972.