APA

Gillespie H., . (1998). ISO 9000 for the chemical peocess industry. New York: McGraw-Hill.

Chicago

Gillespie Helen, . 1998. ISO 9000 for the chemical peocess industry. New York: McGraw-Hill.

Harvard

Gillespie H., . (1998). ISO 9000 for the chemical peocess industry. New York: McGraw-Hill.

MLA

Gillespie Helen, . ISO 9000 for the chemical peocess industry. New York: McGraw-Hill. 1998.