APA (7th ed.) Citation

Collier, J., & Lloyd, J. (1935). Variation on a theme. Grayson & Grayson.

Chicago Style (17th ed.) Citation

Collier, John, and Joy Lloyd. Variation on a Theme. London: Grayson & Grayson, 1935.

MLA (9th ed.) Citation

Collier, John, and Joy Lloyd. Variation on a Theme. Grayson & Grayson, 1935.