APA (7th ed.) Citation

Niemi, T. (1982). A formal description of data structures based on the flat file and hierarchical data models.

Chicago Style (17th ed.) Citation

Niemi, Timo. A Formal Description of Data Structures Based on the Flat File and Hierarchical Data Models. Tampere, 1982.

MLA (9th ed.) Citation

Niemi, Timo. A Formal Description of Data Structures Based on the Flat File and Hierarchical Data Models. 1982.

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