Cita APA (7a ed.)

Hejhal, D. A. (1992). Eigenvalues of the Laplacian for Hecke triangle groups. American Mathematical Society.

Cita Chicago Style (17a ed.)

Hejhal, Dennis A. Eigenvalues of the Laplacian for Hecke Triangle Groups. Providence, Rhode Island, United States: American Mathematical Society, 1992.

Cita MLA (8a ed.)

Hejhal, Dennis A. Eigenvalues of the Laplacian for Hecke Triangle Groups. American Mathematical Society, 1992.