| Title | Author | |
| ANNUAL PROCUREMENT PLAN (FY 2023) | Local Government Unit of Sison | |
| ANNUAL PROCUREMENT PLAN (FY 2022) | Local Government Unit of Sison | |
| ANNUAL PROCUREMENT PLAN (FY 2021) | Local Government Unit of Sison | |
| ANNUAL PROCUREMENT PLAN (FY 2020) | Local Government Unit of Sison | |
| ANNUAL PROCUREMENT PLAN (FY 2019) | Local Government Unit of Sison |