Gaya APA

Needles, B, E. et al (1987). Principles of accounting : working papers IA (3 rd. ed.). Boston: Houghton Mifflin Co..

Gaya MLA

Needles, Belverd, E. et al. "Principles of accounting : working papers IA". 3 rd. ed. Boston: Houghton Mifflin Co., 1987. Text.