APA Style

Abelson, H., Abelson, A. (1992.). Logo for the Macintosh :an introduction through Object Logo . Cambridge, Mass. :: Paradigm Software Inc. :.

MLA Style

Abelson, Harold.., Abelson, Amanda.. "Logo for the Macintosh :an introduction through Object Logo ". Cambridge, Mass. :: Paradigm Software Inc. :, 1992.. .