OECD Environmental Performance Reviews: Latvia 2019. Paris : OECD, 2019. 206 s. OECD Environmental Performance Reviews. Dostupné na : <https://www.oecd-ilibrary.org/environment/oecd-environmental-performance-reviews-latvia-2019_2cb03cdd-en> ISBN 978-92-64-74014-3. [Počet ex. : 1, z toho voľných 0, prezenčne 1]