| Subject | English | Portuguese |
| commun., IT | applications and services reference model | modelo de referência de aplicações e serviços |
| fin. | credit reference service | informação comercial |
| commun., IT | reference database service | serviço de base de dados de referência |
| environ. | reference service | serviço de referência |
| environ. | reference service The provision of aid by library staff trained to interpret library materials and library organizational structures to meet the informational, educational, cultural, recreational or research needs of the library's clients | serviços de referência |