APA

Schildt H., . (1988). DOS 4 Made Easy. Berkeley: McGraw-Hill.

Chicago

Schildt H, . 1988. DOS 4 Made Easy. Berkeley: McGraw-Hill.

Harvard

Schildt H., . (1988). DOS 4 Made Easy. Berkeley: McGraw-Hill.

MLA

Schildt H, . DOS 4 Made Easy. Berkeley: McGraw-Hill. 1988.