APA (7th ed.) Citation

Petar, A. V. (1930). Gallium, germanium, indium, and scandium. [publisher not identified].

Chicago Style (17th ed.) Citation

Petar, Alice Virginia. Gallium, Germanium, Indium, and Scandium. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Petar, Alice Virginia. Gallium, Germanium, Indium, and Scandium. [publisher not identified], 1930.

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