APA Citation

(1982). Natural: Version 1.2 : reference manual. --. North America: Software AG.

Chicago Style Citation

Natural: Version 1.2 : Reference Manual. --. North America: Software AG, 1982.

MLA Citation

Natural: Version 1.2 : Reference Manual. --. North America: Software AG, 1982.

Warning: These citations may not always be 100% accurate.