Elkins, A. J., & Elkins, C. (2004). Where have all the birdies gone? (1st world ed.). Severn House.
Cita Chicago Style (17a ed.)Elkins, Aaron J., y Charlotte Elkins. Where Have All the Birdies Gone? 1st world ed. Sutton, Surrey [England] ; New York, NY: Severn House, 2004.
Cita MLA (8a ed.)Elkins, Aaron J., y Charlotte Elkins. Where Have All the Birdies Gone? 1st world ed. Severn House, 2004.
Precaución: Estas citas no son 100% exactas.