APA

Austing R. H., Association for Computing Machinery & ACM Special Interest Group on Computer Science Education. (1990). Proceedings of the twenty-first SIGCSE technical symposium on Computer science education. New York, NY: ACM.

Chicago

Austing Richard H, Association for Computing Machinery and ACM Special Interest Group on Computer Science Education. 1990. Proceedings of the twenty-first SIGCSE technical symposium on Computer science education. New York, NY: ACM.

Harvard

Austing R. H., Association for Computing Machinery and ACM Special Interest Group on Computer Science Education. (1990). Proceedings of the twenty-first SIGCSE technical symposium on Computer science education. New York, NY: ACM.

MLA

Austing Richard H, Association for Computing Machinery and ACM Special Interest Group on Computer Science Education. Proceedings of the twenty-first SIGCSE technical symposium on Computer science education. New York, NY: ACM. 1990.