Cita APA (7th ed.)

Hahn, G., Sabidussi, G., & Woodrow, R. E. (1990). Cycles and rays. Kluwer Academic.

Cita Chicago (17th ed.)

Hahn, Gena, Gert Sabidussi, i Robert E. Woodrow. Cycles and Rays. Dordrecht: Kluwer Academic, 1990.

Cita MLA (9th ed.)

Hahn, Gena, et al. Cycles and Rays. Kluwer Academic, 1990.