APA (7th ed.) Citation

Mottram, R. H. (1923). A valentine. [publisher not identified].

Chicago Style (17th ed.) Citation

Mottram, R. H. A Valentine. [Place of publication not identified]: [publisher not identified], 1923.

MLA (9th ed.) Citation

Mottram, R. H. A Valentine. [publisher not identified], 1923.