Romero-Carazas, Rafael, Antony Paul Espiritu-Martinez, Enzo Renatto Bazualdo-Fiorini, and David Hugo Bernedo-Moreira. “Chapter 3. Design and Types of Research Studies: Research Design”. In Evidence-Based Biomedicine: Methodology for Research, Standardization, and Scientific Procedural Aspects, edited by Rafael Romero-Carazas, Antony Paul Espiritu-Martinez, Enzo Renatto Bazualdo-Fiorini, and David Hugo Bernedo-Moreira, 16–19. AG Editor, 2025. Accessed December 30, 2025. https://books.southam.pub/index.php/books/catalog/book/978-9915-704-03-6.pdf/chapter/73.