APA (7th ed.) Citation

Afonso, Ó., & Almeida, F. (2017). The nonobserved economy in the European Union.

Chicago Style (17th ed.) Citation

Afonso, Óscar, and Francisco Almeida. The Nonobserved Economy in the European Union. 2017.

MLA (8th ed.) Citation

Afonso, Óscar, and Francisco Almeida. The Nonobserved Economy in the European Union. 2017.

Warning: These citations may not always be 100% accurate.