APA (7th ed.) Citation

(1945). Keep smiling!: 2. Frit Nordisk Forlag.

Chicago Style (17th ed.) Citation

Keep Smiling!: 2. [s.l.]: Frit Nordisk Forlag, 1945.

MLA (8th ed.) Citation

Keep Smiling!: 2. Frit Nordisk Forlag, 1945.