Sekaran, U., & Bougie, R. (2010) Research Methods for Business Sekaran, U., & Bougie, R. (2010). Research Methods for Business. Wiley.
Saunders, M., & Tosey, P. (2015) Handbook of Research Methods in Human Resource Development Saunders, M., & Tosey, P. (2015). Handbook of Research Methods in Human Resource Development. Edwin Elgar Publishing.
Quivy, R., & Campenhoudt, L. V. (1998) Manual de Investigação em Ciências Sociais Quivy, R., & Campenhoudt, L. V. (1998). Manual de Investigação em Ciências Sociais. Gradiva.
Easterby-Smith, M., Thorpe, R., Jackson, P. R., & Jaspersen, L. J. (2018) Management and Business Research (Sixth ed.) Easterby-Smith, M., Thorpe, R., Jackson, P. R., & Jaspersen, L. J. (2018). Management and Business Research (Sixth ed.). SAGE Publications Ltd.