Gaya APA

Christensen, L, C. (1992). Dr. Frodo Computer Assisted Instruction: Elementary Computer Applications Frodo I & Frodo II (Third Ed.). Minnesota: Burgess International Group.

Gaya MLA

Christensen, Larry, C.. "Dr. Frodo Computer Assisted Instruction: Elementary Computer Applications Frodo I & Frodo II". Third Ed. Minnesota: Burgess International Group, 1992. Text.