Smiles, S. Ayúdate! (self-help).
Cita Chicago (17th ed.)Smiles, Samuel. Ayúdate! (self-help).
Cita MLA (8th ed.)Smiles, Samuel. Ayúdate! (self-help).
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)