Gaya APA

Lefton, R, E., Loeb, J, T. (2005). Creating an effective task management system . Jakarta: PT. Bhuana Ilmu Populer.

Gaya MLA

Lefton, Robert, E.., Loeb, Jerome, T.. "Creating an effective task management system". Jakarta: PT. Bhuana Ilmu Populer, 2005. Text.