APA (7th ed.) Citation

Gallivan, K., Sameh, A., & Zlatev, Z. (1991). Parallel direct method codes for general sparse matrices.

Chicago Style (17th ed.) Citation

Gallivan, K., A. Sameh, and Z. Zlatev. Parallel Direct Method Codes for General Sparse Matrices. Urbana, Ill, 1991.

MLA (9th ed.) Citation

Gallivan, K., et al. Parallel Direct Method Codes for General Sparse Matrices. 1991.