Gaya APA

Doane, D, P., Seward, L, E. (2008). Essentia; Statistics in Business & Economics . canada: Mc Graw Hill.

Gaya MLA

Doane, David, P., Seward, Lori, E. "Essentia; Statistics in Business & Economics". canada: Mc Graw Hill, 2008. Compact Disk.