Cita APA

Kenneth Williams & Mark Gaskell. (2002). Teacher's guide: The cosmic calculator (books 1,2 and 3). Motilal Banarsidass.

Chicago Edition Citation

Kenneth Williams i Mark Gaskell. Teacher's Guide: The Cosmic Calculator (books 1,2 and 3). New Delhi: Motilal Banarsidass, 2002.

Cita MLA

Kenneth Williams i Mark Gaskell. Teacher's Guide: The Cosmic Calculator (books 1,2 and 3). Motilal Banarsidass, 2002.