Cita APA (7a ed.)

Sieber, J. H. (1973). An introduction to the Tractate Zostrianos from Nag Hammadi. [s.n.].

Cita Chicago Style (17a ed.)

Sieber, John H. An Introduction to the Tractate Zostrianos from Nag Hammadi. [S.l.]: [s.n.], 1973.

Cita MLA (9a ed.)

Sieber, John H. An Introduction to the Tractate Zostrianos from Nag Hammadi. [s.n.], 1973.