Cita APA (7a ed.)

Heller, Á. (1982). A theory of history. Routledge & Kegan Paul.

Cita Chicago Style (17a ed.)

Heller, Ágnes. A Theory of History. London [etc.]: Routledge & Kegan Paul, 1982.

Cita MLA (9a ed.)

Heller, Ágnes. A Theory of History. Routledge & Kegan Paul, 1982.