APA (7th ed.) Citation

Hegg, T. (1989). Phase relationships in the BaO-Y₂O₃-Cu-O system. [publisher not identified].

Chicago Style (17th ed.) Citation

Hegg, Turi. Phase Relationships in the BaO-Y₂O₃-Cu-O System. [Place of publication not identified]: [publisher not identified], 1989.

MLA (9th ed.) Citation

Hegg, Turi. Phase Relationships in the BaO-Y₂O₃-Cu-O System. [publisher not identified], 1989.